RE: (ROSE) Associations maps to Relationships-Data modelling

2002-02-22 Thread Nallamilli, Surya 



Refer 
to the DataModeler manaual.  Page 25 onwards.
http://www.rational.com/docs/v2002/Rose_dm.pdf
 
Brief 
explanation in the online help:
 
Help 
> Contents and Index > Contents tab > Rose Data Modeler > Reference 
> Transform Mapping > Transformation Mapping Object Model 
Elements
 
Hope 
that helps.
 
Sonny

  -Original Message-From: Martin Paul 
  [mailto:[EMAIL PROTECTED]]Sent: Thursday, February 21, 2002 
  10:06 PMTo: [EMAIL PROTECTED]Subject: (ROSE) 
  Associations maps to Relationships-Data modelling
  Hi all,
          if 
   ADDRESS AND PARENT ARE dentifying relationships since child instance 
  can't exist
  without parent.
  IF CLINIC AND SERVICE are non-identifying since 
  they are independent entites and  have no strong 
  dependence.Fine.
   
  How about 1:1 relationship between ITEM and 
  ITEMPICTURE  is this identifying or non??
  How about 1:N relationship between ITEM and 
  ORDERED ITEM 
  how do you justify these are 
  NON-identifying??
  Please provide me with a few concrete example of 
  mapping all kinds of relationships 
  while mapping an object model to data 
  model
   
  Thanks in advance
  Martin 
Paul 

(ROSE) Associations maps to Relationships-Data modelling

2002-02-21 Thread Martin Paul 



Hi all,
        if 
 ADDRESS AND PARENT ARE dentifying relationships since child instance can't 
exist
without parent.
IF CLINIC AND SERVICE are non-identifying since 
they are independent entites and  have no strong 
dependence.Fine.
 
How about 1:1 relationship between ITEM and 
ITEMPICTURE  is this identifying or non??
How about 1:N relationship between ITEM and ORDERED 
ITEM 
how do you justify these are 
NON-identifying??
Please provide me with a few concrete example of 
mapping all kinds of relationships 
while mapping an object model to data 
model
 
Thanks in advance
Martin Paul